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Updated: May 31, 2025
Shattered masses of greenstone. Immense valleys. Mines. State of miners. Santiago. Hot-baths of Cauquenes. Gold-mines. Grinding-mills. Perforated stones. Habits of the Puma. El Turco and Tapacolo. Humming-birds. The "Beagle" anchored late at night in the bay of Valparaiso, the chief seaport of Chile. When morning came, everything appeared delightful.
Agassiz found the rounded and moutonnees surfaces and the general modeling of the outlines of ice no less marked here than in the Strait; and in a ramble over the hills above the anchorage, M. de Pourtales came upon very distinct glacial scorings and furrows on dikes and ledges of greenstone and syenite.
We have had a revival of pagan temple-building in wood and stucco; we have seen Gothic cathedrals copied for the simplest Protestant uses, until humorists have suggested that congregations might find it cheaper to change their religion than their unsuitable new churches; we have ranged from four plain brick walls to vast and costly piles of marble or greenstone; we have constructed great audience-rooms for Sunday school uses alone, and have equipped the sanctuary with all culinary attachments; we have built parish-houses whose comfort the best-kept mediæval monk might envy, and we have put up evangelistic tabernacles only to find the most noted evangelists preferring to work in regular church edifices rather than in places of easy resort by the thoughtless crowd of wonder-seekers.
We left our horses at the entrance, and spent an hour or two in hunting the place over. The ground was covered with pieces of obsidian knives and arrow-heads, and fragments of what seemed to have been larger tools or weapons; and we found numbers of hammer-heads, large and small, mostly made of greenstone, some whole, but most broken. We find two sorts of stone hammers in Europe.
During August, this branch was found almost dry; in mid-September, it was nearly full, and here the water breaks with the greatest violence. The right bank is subtended for some hundred yards by blocks of granite and greenstone, pitted with large basins and pot-holes, delicately rounded, turned as with a lathe by the turbid waters.
This is also another form of igneous rock, admitting of every variety of composition. It comprehends any rock in which round or almond-shaped nodules of some mineral, such as agate, chalcedony, calcareous spar, or zeolite, are scattered through a base of wacke, basalt, greenstone, or other kind of trap. It derives its name from the Greek word amygdalon, an almond.
This they do by removing the hard red outer coating, and baring to view the natural colour of the greenstone, according to the outline they have traced. Much ability is displayed in many of these representations, the subjects of which could be discovered at a glance.
They found certain rocks, for the most part without stratification, and of a peculiar mineral composition, to which they gave different names, such as basalt, greenstone, porphyry, trap tuff, and amygdaloid.
Patches of the northern drift, at elevations of about 200 feet above the Thames, occur in the neighbourhood of London, as at Muswell Hill, near Highgate. In this drift, blocks of granite, syenite, greenstone, Coal-measure sandstone with its fossils, and other Palaeozoic rocks, and the wreck of Chalk and Oolite, occur confusedly mixed together.
The strata are inclined, as before stated, from 20 to 30 degrees eastward, towards an irregular north and south chain of andesitic porphyry and of porphyritic greenstone, where they are abruptly cut off.
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